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/* $OpenBSD: gscbus.c,v 1.31 2018/05/14 13:54:39 kettenis Exp $ */
/*
* Copyright (c) 1998 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
/* #define GSCDEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/reboot.h>
#include <machine/iomod.h>
#include <machine/autoconf.h>
#include <machine/cpufunc.h>
#include <hppa/dev/viper.h>
#include <hppa/gsc/gscbusvar.h>
int gscmatch(struct device *, void *, void *);
void gscattach(struct device *, struct device *, void *);
const struct cfattach gsc_ca = {
sizeof(struct gsc_softc), gscmatch, gscattach
};
struct cfdriver gsc_cd = {
NULL, "gsc", DV_DULL
};
int
gscmatch(parent, cfdata, aux)
struct device *parent;
void *cfdata;
void *aux;
{
struct confargs *ca = aux;
return !strcmp(ca->ca_name, "gsc");
}
void
gscattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct gsc_softc *sc = (struct gsc_softc *)self;
struct gsc_attach_args *ga = aux;
int s, irqbit;
sc->sc_iot = ga->ga_iot;
sc->sc_ic = ga->ga_ic;
irqbit = cpu_intr_findirq();
if (irqbit >= 0)
printf(" irq %d", irqbit);
#ifdef USELEDS
if (machine_ledaddr)
printf(": %sleds", machine_ledword? "word" : "");
#endif
printf ("\n");
if (irqbit < 0)
sc->sc_ih = NULL;
else
sc->sc_ih = cpu_intr_establish(IPL_NESTED, irqbit,
gsc_intr, (void *)sc->sc_ic, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf("%s: can't establish interrupt\n", sc->sc_dev.dv_xname);
return;
}
/*
* On ASP, the IAR register is not writable; we need to go through
* the memory controller to achieve proper routing.
*/
s = splhigh();
if (ga->ga_parent == gsc_asp)
viper_setintrwnd(1 << irqbit);
else
sc->sc_ic->iar = cpu_gethpa(0) | (31 - irqbit);
splx(s);
pdc_scanbus(self, &ga->ga_ca, MAXMODBUS, 0, 0);
}
int
gscprint(aux, pnp)
void *aux;
const char *pnp;
{
struct gsc_attach_args *ga = aux;
if (pnp)
printf("%s at %s", ga->ga_name, pnp);
return (UNCONF);
}
void *
gsc_intr_establish(sc, irq, pri, handler, arg, name)
struct gsc_softc *sc;
int pri;
int irq;
int (*handler)(void *v);
void *arg;
const char *name;
{
void *iv;
if ((iv = cpu_intr_map(sc->sc_ih, pri, irq, handler, arg, name)))
sc->sc_ic->imr |= (1 << irq);
else {
#ifdef GSCDEBUG
printf("%s: attaching irq %d, already occupied\n",
sc->sc_dev.dv_xname, irq);
#endif
}
return (iv);
}
void
gsc_intr_disestablish(sc, v)
struct gsc_softc *sc;
void *v;
{
#if notyet
sc->sc_ic->imr &= ~(1 << irq);
cpu_intr_unmap(sc->sc_ih, v);
#endif
}
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